package com.itheima.Demo1;

import java.util.Scanner;

public class Demo1 {
    public static void main(String[] args) {

        //16,Scanner scanner = new Scanner(System.in);
        //21,if(first != last){
        //24,for(int i = str.length() - 1; i >= 0; i--){
        //29,char[] chs = new char[ser.length()];
        //36,chs[i] = '*';
    }
}




